Delayedcollection-field measurements of carrier \_eeneration and delayed fluorescence in metal-free phthalocyanine have been shown to exhibit the same time dependence. This indicates the esistence of geminate electron-hole pairs with survival times estending to tens of milliseconds.
Observation of Davydov splitting in the MCD spectra of α metal-free phthalocyanine
✍ Scribed by B.R. Hollebone; M.J. Stillman
- Publisher
- Elsevier Science
- Year
- 1974
- Tongue
- English
- Weight
- 357 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The.magnetic circular dichroism and absorption spectra of (Y metal-free pfithalocyanine have been measured at 300 and 8 K. Using both techniques the visible spectrum can be ar;dysed'as,two transitions to degenerate and two to nondegenerhte excited states. These excited states are assigned as the differently split pairs of Davydov components derived from the lowest energy E, and AZ" states of the mor.omeric 18n electron phtholocyanine ring.
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## Abstract The effect of substituents on the position and intensity of the electronic absorption and fluorescence spectra of phthalocyanines (Pcs) was examined for 35 Pc compounds. When electron‐releasing groups are bound to four __α__‐benzo positions of the Pc skeleton, the B and Q bands shift to